* {
  margin: 0;
  padding: 0;
}
html,
body {
  height: 100%;
}
.height100 {
  height: 100%;
}
.container-fluid {
  height: 100%;
  background-image: url("https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic.vjshi.com%2F2021-03-11%2Fe6853cd7f015f1a052b8f4996cb15da5%2Fonline%2F8f85303db5b515100c6a8dfd53f1a8d0.jpg%3Fx-oss-process%3Dstyle%2Fresize_w_720&refer=http%3A%2F%2Fpic.vjshi.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1667037129&t=9e872eba229ae6cea78756cd1fca5f5f");
  background-repeat: no-repeat;
  background-size: cover;
}

